rT3 (Reverse Triiodothyronine) ELISA Kit (UNFI0097)

Reverse triiodothyronine (rT3) is the biologically inactive isomer of triiodothyronine (T3), produced from thyroxine (T4) through inner-ring deiodination. Because rT3 levels rise in non-thyroidal illness syndrome and during altered peripheral conversion of thyroid hormones, quantitative rT3 measurement is widely used by researchers to characterize euthyroid sick syndrome, critical illness, and drug-induced changes in thyroid metabolism. This Assay Genie Competitive ELISA kit is supplied as a 96 Assays pack suitable for serum or plasma matrices, and is intended for in vitro research use, supporting laboratory workflows that map rT3 dynamics in mammalian models of endocrine disruption, fasting, and systemic illness.